99.5% purity oxygen is used in_____________________?
(A) Cutting and welding by oxy-acetylene flame
(B) Hospitals for medicinal purposes
(C) Gas masks and artificial breathing apparatus
(D) All A, B, and
Pig iron is produced by blast furnaces in India using mostly the iron ore named _______________?
(A) Hematite
(B) Magnetite
(C) Siderite
(D) Chalcopyrite
Lubricating greases are a mixture of__________________?
(A) Mineral oil, soap and additives
(B) Mineral oil and metallic soap
(C) Mineral oil and fatty oil
(D) Fatty oil and metallic soap
Which of the following fuel gases contains maximum amount of carbon monoxide ?
(A) Coke oven gas
(B) Water gas
(C) Blast furnace gas
(D) L.
____________________ process is used for producing soda ash?
(A) Chamber
(B) Chance
(C) Tromp
(D) Solvay
Main constituents of cotton fiber is__________________?
(A) Lignin
(B) Cellulose
(C) Starch
(D) Gelatine
Chrome tanning and vegetable tanning are done for ________________?
(A) Light & heavy leather respectively
(B) Heavy & light leather respectively
(C) Both light & heavy leather
(D) Neither light nor heavy leather
The difference between saponification value and acid value is____________________?
(A) Called ester value
(B) Always negative
(C) Constant for all fatty oils
(D) None of these
In the manufacture of H2SO4, vanadium catalyst as compared to platinum catalyst___________________?
(A) Gives higher conversion efficiency
(B) Has a longer life and is not poisoned by arsenic
(C) Handles lower SO2 content gas (7 -10% SO2), thus increasing the capital cost of the plant
(D) All A ,